National Rankings

National Data Info
Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Contiguous U.S.

Precipitation Rankings, July 1930

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
July 1930
1-Month
1.79"
(45.47mm)
2.78"
(70.61mm)
-0.99"
(-25.14mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1950, 1958
Jun–Jul 1930
2-Month
4.12"
(104.65mm)
5.70"
(144.78mm)
-1.58"
(-40.13mm)
1st Driest
Driest since:
1930
128th Wettest
Wettest since:
1928
May–Jul 1930
3-Month
7.29"
(185.17mm)
8.62"
(218.95mm)
-1.33"
(-33.78mm)
11th Driest
Driest since:
1988
118th Wettest
Wettest since:
2015
Apr–Jul 1930
4-Month
9.12"
(231.65mm)
11.13"
(282.70mm)
-2.01"
(-51.05mm)
4th Driest
Driest since:
1934
125th Wettest
Wettest since:
2015
Mar–Jul 1930
5-Month
11.10"
(281.94mm)
13.64"
(346.46mm)
-2.54"
(-64.52mm)
6th Driest
Driest since:
1936
123rd Wettest
Wettest since:
1973
Feb–Jul 1930
6-Month
12.84"
(326.14mm)
15.78"
(400.81mm)
-2.94"
(-74.67mm)
3rd Driest
Driest since:
1934
126th Wettest
Wettest since:
2019
Jan–Jul 1930
7-Month
15.42"
(391.67mm)
18.09"
(459.49mm)
-2.67"
(-67.82mm)
6th Driest
Driest since:
1934
123rd Wettest
Wettest since:
2019
Dec 1929–Jul 1930
8-Month
17.63"
(447.80mm)
20.43"
(518.92mm)
-2.80"
(-71.12mm)
6th Driest
Driest since:
1931
122nd Wettest
Wettest since:
2019
Ties: 1918
Nov 1929–Jul 1930
9-Month
19.59"
(497.59mm)
22.66"
(575.56mm)
-3.07"
(-77.97mm)
6th Driest
Driest since:
1934
122nd Wettest
Wettest since:
2019
Oct 1929–Jul 1930
10-Month
22.19"
(563.63mm)
24.83"
(630.68mm)
-2.64"
(-67.05mm)
14th Driest
Driest since:
1934
114th Wettest
Wettest since:
2019
Sep 1929–Jul 1930
11-Month
24.94"
(633.48mm)
27.33"
(694.18mm)
-2.39"
(-60.70mm)
18th Driest
Driest since:
1934
110th Wettest
Wettest since:
2019
Aug 1929–Jul 1930
12-Month
26.74"
(679.20mm)
29.95"
(760.73mm)
-3.21"
(-81.53mm)
11th Driest
Driest since:
1918
117th Wettest
Wettest since:
2019
Feb 1929–Jul 1930
18-Month
43.21"
(1,097.53mm)
45.74"
(1,161.80mm)
-2.53"
(-64.27mm)
26th Driest
Driest since:
1931
102nd Wettest
Wettest since:
2019
Aug 1928–Jul 1930
24-Month
56.95"
(1,446.53mm)
59.92"
(1,521.97mm)
-2.97"
(-75.44mm)
21st Driest
Driest since:
1918
106th Wettest
Wettest since:
2020
Aug 1927–Jul 1930
36-Month
88.05"
(2,236.47mm)
89.88"
(2,282.95mm)
-1.83"
(-46.48mm)
42nd Driest
Driest since:
1956
84th Wettest
Wettest since:
2019
Aug 1926–Jul 1930
48-Month
121.61"
(3,088.89mm)
119.78"
(3,042.41mm)
1.83"
(46.48mm)
74th Driest
Driest since:
1956
51st Wettest
Wettest since:
2019
Aug 1925–Jul 1930
60-Month
149.82"
(3,805.43mm)
149.64"
(3,800.86mm)
0.18"
(4.57mm)
62nd Driest
Driest since:
1934
62nd Wettest
Wettest since:
2019

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